Michael Lucas' book Tarsnap - an encrypted storage system for Unix users who want extreme levels of paranoia about the security of their backups. Michael is a very famous sysadmin-writer who deserves first place for anything he writes.

Thank you to everyone who has bought it so far; I hope you have found it useful.

Greg Baker is one of the world's leading experts on HP Data Protector. His consulting services are athttp://www.ifost.org.au/dataprotector. He has written numerous books (see http://www.ifost.org.au/books) on it, and on other topics. His other interests are startup management, applications of automated image and text analysis and niche software development.